I have two large pine bookcases that I finished about 10 years ago. They are stained dark. I forget if there is water or oil based polyurethane on them, but there are two coats of it.
My problem is that the grain was raised and so it is somewhat rough, which makes dusting difficult. I was thinking if I sand and put a couple more coats of finish on it, it may smooth it out. Am I incorrect on this point? Does it matter if I put water based or oil based polyurethane on it, not knowing what's underneath?
thanks for any advise, Bonnie